No potatoes for me—I’m a diet.A. atB. inC. onD. with

问题补充：

No potatoes for me—I’m a diet.

A. at

B. in

C. on

D. with

答案：

A. at

B. in

(答案→)C. on

D. with

解析：考查介词。be on a diet节食。句意：我不要土豆——我再节食。